there are roughly 400 serving in afghanistan and pakistan so far. do you see this as the future? >> i hope it is the future. i... i think this is something we probably should have did right after 9/11. >> reporter: crawford believes that small groups of u.s. soldiers like him will still be living with the afghan people long after the combat troops have pulled out. mandy clark, cbs news, kandahar. >> schieffer: norway's intelligence chief said today the man who's confessed to massacring 76 people last week acted alone, and tonight, we're getting our first view of the explosion in oslo. surveillance video from an electronics store shows the force of the blast. a new study may answer the question do cell phones put young people at risk of getting cancer? a cold case murder may be solved 53 years later. and presidents, generals, and privates have all been treated there. walter reed's proud history when the "cbs evening news" continues. is t oh, there's a prize, all right. [ male announcer ] inside every box of cheerios are those great-tasting little o's made from carefully selected o